package com.deep.seckill.interceptor;

import com.deep.common.model.constant.AuthConstant;
import com.deep.common.model.dto.MemberResponseVO;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.PrintWriter;

/**
 * 用户登录拦截器
 *
 * @author Deep
 * @date 2022/2/14
 */
@Component
public class LoginInterceptor implements HandlerInterceptor {

    public static ThreadLocal<MemberResponseVO> loginUser = new ThreadLocal<>();

    /**
     * 方法执行前拦截（请求到达之前）
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String uri = request.getRequestURI();
        AntPathMatcher antPathMatcher = new AntPathMatcher();
        boolean match = antPathMatcher.match("/api/seckill/kill", uri);
        // 只有秒杀需要拦截，其他直接放行
        if (match) {
            HttpSession session = request.getSession();
            MemberResponseVO attribute = (MemberResponseVO) session.getAttribute(AuthConstant.LOGIN_USER);
            if (attribute != null) {
                loginUser.set(attribute);
                return true;
            } else {
                // 未登录，返回登录页面
                response.setContentType("text/html;charset=UTF-8");
                PrintWriter out = response.getWriter();
                out.println("<script>alert('请先进行登录，再进行后续操作!');location.href='http://auth.mall.com/api/auth/login.html'</script>");
                return false;
            }
        }
        return true;
    }

    /**
     * 方法执行后拦截
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }
}
